Since experts mapped the human genome, the continuous flow of new information has affected decisions people are making about their health. As part of our series, "North Carolina Voices: Diagnosing Health Care," producer Susan Davis considers what people learn from genetic testing and if it’s always helpful. When Susan’s father died of Alzheimer’s disease in 1992 experts were not sure if there was a genetic link to the disease. But now they’re sure. And there’s a test she could take to find out if she has it.